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Apparatus and method of frame rate up-conversion with dynamic quality control

Inactive Publication Date: 2011-03-31
SILICON INTEGRATED SYSTEMS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008]In view of the above-mentioned problems, an object of the invention is to provide an apparatus of frame rate up-conversion, which determines a corresponding image output mode dynamically according to quality of motion vectors, thereby reducing a visual impact due to incorrect motion vectors.

Problems solved by technology

However, under certain circumstances, many ME methods are inclined to fall in the trap of the local minimum SAD value.
However, wrong motion vectors degrade image quality significantly and current ME algorithms cannot ensure to find out the correct motion vectors.

Method used

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Embodiment Construction

[0024]In the present disclosure, numerous specific details are provided, such as examples of electrical circuits, components, and methods, to provide a thorough understanding of embodiments of the invention. Persons of ordinary skill in the art will recognize, however, that the invention can be practiced without one or more of the specific details. In other instances, well-known details are not shown or described to avoid obscuring aspects of the invention.

[0025]A feature of the invention is to determine the number of interpolated images dynamically according to motion vector quality. If the motion vector quality is good enough, all intermediate images are the interpolated images (the definitions of an intermediate image and a interpolated image will be described later). If the motion vector quality is general, parts of the intermediate images are repeat image (repeating the previous original image) and parts of the intermediate images are the interpolated images. If the motion vect...

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Abstract

A frame rate up-conversion apparatus comprises a motion vector detecting circuit, a dynamic quality control circuit, a motion compensation circuit and a pull-down recovery circuit. According to quality of motion vectors, a corresponding image output mode is determined dynamically. A visual impact due to incorrect motion vectors is reduced and the visual experience is also improved.

Description

[0001]This application claims the benefit of the filing date of Taiwan Application Ser. No. 098121763, filed on Jun. 29, 2009, the content of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the invention[0003]The invention relates to frame rate up-conversion (FRUC), particularly to an apparatus and method of frame rate up-conversion with dynamic quality control.[0004]2. Description of the Related Art[0005]Frame rate up-conversion (FRUC) is the conversion process between any two display formats with different frame rates. FRUC has various applications, e.g., saving bandwidth in low bit-rate video transmission, reducing movies juddering in converting a 24 fps video source into a higher frame rate and reducing blurring effect in a hold-type liquid crystal display (LCD).[0006]Most FRUC use motion estimation (ME) to obtain motion vectors of moving objects and then perform motion compensated interpolation (MCI) to interpolate images of the moving obj...

Claims

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Application Information

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IPC IPC(8): H04N7/01
CPCH04N7/0112H04N7/014H04N7/0132
Inventor WU, HUNG WEICHANG, CHIH-YUHUANG, WEN-YEN
Owner SILICON INTEGRATED SYSTEMS
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